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Coolant draining.
WARNING: Hot engine coolant and steam can cause injury.
When adding to or draining coolant or antifreeze solution from
the engine radiator, stop the engine at least one minute prior to
releasing the radiator filler cap. Using a cloth to protect the
hand, slowly release the filler cap, absorbing any released fluid
with the cloth. Do not remove the filler cap until all excess fluid
is released and the engine cooling system fully depressurised.
WARNING: Follow the instructions provided by the antifreeze
supplier when adding or draining the antifreeze solution. It is ad-
visable to wear personal protective equipment to prevent skin
and eye contact with the antifreeze solution.
Remove the radiator cap.
Slacken the bottom radiator hose clamp to drain the coolant from the
radiator.
Fig. 12
A Cylinder block water drain valve
Coolant Filter Replacement
Fig. 13
Rotate clockwise to close shut-off valve. Remove and replace coolant
filter. Open shut-off valve
PERIODICAL INSPECTION AND MAINTENANCE
9/270, 9/300, 12/235, 17/235, 21/215, 9/270HA, 9/300HA, 10/300HA, 12/235HA, 17/235HA, 21/215HA
Fig. 14
Filling with coolant
Ensure that the engine is cool.
Close the coolant drain plug and tighten the bottom hose clamp.
Use clean water mixed 50/50 with antifreeze as a coolant.
Fill slowly to prevent air entering the cooling system.
For Coolant volume, refer to "General Information section"
When the system has been filled, operate the engine about five
minutes at a low idle speed, then as the air contained in the coolant
circuit is bled off the coolant level will drop.
Stop the engine and replenish with the correct coolant mix.
Cleaning outside of Radiator, Oil cooler and Charge Air Cooler
Debris, mud or dried grass caught between radiator fins will block the
air flow, resulting in lower cooling efficiency. Clean the radiator fins with
steam or low pressure (< 5 Bar) compressed air every 250 hours or 3
months (whichever comes first) or more frequently in adverse
operating conditions.
Cooling System Circuit Cleaning
When the cooling system circuit is contaminated with water scales or
sludge particles, cooling efficiency will be lowered. Periodically clean
the circuit interior with a suitable cleaner.
Clean the cooling system circuit every 1000 operating hours or 12
months, whichever comes first.
53
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